Hoist drum mounting



Aug. 28, 1951 E. M. WAGNER ETAL 2,565,791

HOIST DRUM MOUNTING Filed March 12, 1946 2 Sheets-Sheet 1 IN VENTORSv f/145.5111001@ BY 0 o ATTORNEY Mays/e,

W M l Aug 23, 1951 E. M. WAGNER ETAL 2,565,791

' HoIsT DRUM MOUNTING Filed March l2, 1946 2 Sheets-Sheet 2 ATTORNEY Patented Aug. 28, 1951 2,515,791 Y nols'r DRUM lvioUN'rINo.v

Edmond M. Wagner, San Marino, and James Moon, Altadena, Calif., assignors to Western Oil Tool & Engineering Co. Inc., Glendale, Calif., a corporation of California Application March 12, 1946, Serial No. 653,874

This invention relates to a drum mounting, and particularly to a hoist or winch drum mounting employing livev shaft;

It is an object of the invention to construct a hoist drum mounted on a stub shaft or other live shafts.

It is a further object of the invention to apply the driving force directly to the drum with the stub shaft acting primarily as an axle.

It is a. further` object of the invention to provide for selectively connecting and disconnecting the drum from the Adriving means so that the drum may be driven by the driving means or may operate as ay free-wheeling drum.

It is a further object of the invention to construct such va. drum device in which a watercooled air or hydraulic operated clutch is employed as the means for connecting the drum to the drivingl means, and particularly one in which the air or hydraulic pressure is applied at the axis of the drum axle. y

It is a further object of the invention to construct a drum shaft mounting in which independent bearing systems are used, for example, two

independent bearing systems, one of which, lo-A cated at the driven end of the drum, takes substantially the entire rotational load when the drum is driven, with the second system. also located at the driven end of the druml taking substantially only the static loads when the drum is driven.

It is a further object of the invention to construct Vthe drum in a simple and light-weight manner with simple and independently replaceable end shaft constructions and mounting, and which may be driven at dierentspeeds by hilow" drives at the ends of the drum.

These and other objects will be apparent from the further description of a preferred embodiment of the invention, taken together with the drawings, in which Fig. 1 is a plan assembly view of the drum of the invention; and

Fig. 2 is a vertical section of one end of the drum; and Y Fig. 3 is a vertical'section through the rotor seal.

'I'he drum I which has internal longitudinal strengthening ribs Z'carries a groove jacket or spool 3. The drum I isr bolted to a flange 4 and to a shaft, bearing and clutch sprocket assembly of like constructionatthe ends A and B of the drum,V axiallyvmounted on the'vshaft. Suitable end supprtspi. e., pillow blocks, are provided which may be mounted on a suitable foundation 9 Claims. (Cl. 254-187 l or structure designed to receivethe drum. 'I'his obvious feature is not shown. Ends A and B are constructed exactly alike except that the end B carries a sprocket and a clutch of smaller diameter than the end A. When mounted for operation the sprocket I0 of ends A and B are each always connected to the source of motive power and in rotation loads may be instantaneously transferred from end A to end B to drive the drum selectively at two different speeds by merely throwing a valve to transfer the air pressure from one clutch to the other.

Since both ends A and B. are similarly constructed only the end A will be described.

The drum I is bolted to the drumy flange l which is formed with a hub 5. Positioned in hub 5 is the stub shaft 6 held in place, by the draw bolt 1, against the end of the hub 5 by means of a shoulder 6'. Bearings 8 and 9 are mounted longitudinally spaced on the stub shaft 6. While ball bearings are shown, other types of roller bearings may be employed.

The sprocket disc III upon which sprocket IU is boltedis` formed with the hub II which is bolted to the stirrup I2 by bolts I3. The bearings 8 and 9 are held in place by the hub II and stirrup I2 against shoulders suitably formed in the shaft 6. shaft E so that the shaft is not in driving or frictional contact at the opposing surfaces of II and I2 under any condition of loading.

Mounted exteriorly of the stirrup I2 and retained by shoulders formed in the stirrup I2 and on the sprocket disc III is a thrust roller bearing I5. The pillow block I6 is mounted on the bearing I5. The bearing I5 is restrained by ring IB' on one end (A) and not restrained by a ring I6 on the other end. This permits movement due to expansion thereof, imposing no thrust load on l5 as a result of such expansion. Lubrication passageways I5' are provided connecting the bearings I5, 8 and 9 so that one shot lubrication, through a connection not shown, to the bearing I5 will also lubricate the bearings 8 and 9. Rotary seals I1 retained by ring I8 and other like rotary seals I1 are positioned between the pillow block and the sprocket Idisc Ill, end cap Il, and also between Vthe stirrup I2 and retaining ring I8 mounted on the pillow block I6. These, in cooperation with the closure I9 mounted at the end of the drum shaft and bearing assembly, act to contain the lubricant.

A bore 2l is formed in the end of the closure 'I9 and connects with a bore 22 formed in a-n external rib 20 on the closure I9. The bore 22 The hub Il is spaced from thestub shaft I.

l connects with a bore ZI in the stirrup I2 and with a bore 2l in the hub vI I. To the bore 24 is connected the air hose line 25 of the air-operated clutch to be described below.

Air is admitted under pressure to the bore system by a line II passing through the pillow block and connected to the rotary air seal 31 mounted in the bore 2|.

The clutch is constructed to be air-operated as follows. A housing 26, coaxial with the shaft. is bolted to the sprocket disc II. The housing holds an inflatable pneumatic tube 21 on which is positioned a clutch pressure plate 2l. A plurality of leaf springs 2s are positioned in uniform spacing around the periphery of the plate II and held in place in holes formed in the sides of the housing 26. Upon the springs 29 is mounted a a line is being unreele'd'from the drum, as when a weight is being lowered, the condition described for the free-wheelingl end obtains at both ends A and B. 'I'he drum speed is controlled by the brake II. v'.'lhe water mist entersthe grooves II and is vaporized by jthe frictional heat to thus cool the brake and clutch ring during clutching to overcome frictionai heat developed during slippage-` J The drum during fr'eewheeling atboth vends A and B thus rotatesat a. diiferentspeed `and in a direction reverse to the direction of rotation of the sprockets atboth ends A and Bi- The bearings I and I rotate andtake the rotational 'loads which are, gf course' vngkmer--than the.ro

tational loads exerted when such weightis lifted clutch plate Ill having a suitable surface for frictional engagement with the 'clutch ring Il, which, together with the `brake flange I2, is mounted on the `drum flange .4." The clutch faces are therefore parallel to and co-axial with the The brake drum flange 32 is grooved at II and .spaced from the clutch ring Il, so that a circumferential opening I4 is provided into which may be placed a stationary waterline I5.

On the exterior surface oi the brake flange I2 is mounted a conventional brake block II which may be operated by hand or power means in any conventional manner to engage the brake flange for braklngburposes.

Upon application of air pressure through II the tube 21 expands. thusforcing the split plate II to expand and forcing the spring ZI to expand the split clutch plate II against the inner face of the plate I2.

The sprocket I If' of the end A is connected toi l I the drum via heciutch and thus to the hub I and the shaft I'. Thus, shaft I and the disc III are rotating at the same. R. P. M. and the bearings I and I are stationary. The rotational loads vare transferred from the sprocket disc, II and through the hub I l,ystirrup I2, to the pillow block via the bearing II. The static loads on the drum are transferred to the pillow block II via bearings I, shaft I, and through the bearing I to the stirrup I2, and via thev bearing i5 to the pillow block I6. The thrust load on the drum is transferred fromthe' draw-bolt through I, against which it abuts, to II.

Referring tothjecondition in end B. the clutch is disengaged 'so that the end B is in free-wheeling condition. i. e.. the sprocket disc II of end B is disengaged from` the rotating drum. -The stub shaft I of end B rotates at the R. P. M. of the drum. Sincethe sprocket at end B is of smaller diameter and rotates at a higher R.. P. M. thanv that of end A. the sprocket I I, the hub Il, and the stirrup I2 of end B'will rotate at a higher R. P. M. than the shaft 6 of end B. 0f course, the sprockets may be of the same diameter if driven from dierent power sources which will drive the sprockets each at the desired speed. The end to be btained is to drive the end sprockets at dii! rent speeds. The bearings I and I of end B thus rotate and are not stationaryas in ,the caseof the same bearings in end A when the end A is driven.

The'condition described vabove also exists in similar manner when the power is applied to end B by clutching at end B and declutching at end A. This can be done almost instantaneously by a valve (not shown) in line II.

When the drum is free-wheeling, with .both

ends A andv B -declutched as. for example, when sible. v e

- This spacing and arrangement ,of the bearings by application of power to endLA or end B with,

the drum suitably clutch-jconnected tothefdrivingvmeans.

i Ball and roller bearings will carry much greater static loads when they are stationary than when they are rotating, We may thus employ smaller bearings l and I and place them Vcloser together than where the static'loads of the loadedendare to be transferred through rotating- 1.b e 'a rings.A

This is alsoaided byplacing the bearing II between the bearings I and I and making the bearing II of a greater diameter than I' and I. This places bearing II exteriorly of the stirrup I2. This divides the radial loads'between I and I and transfers the loads to II. The bearings can thus .be madey'of a size adequate to take the static and rotational and shock loads without requiring undue increase of they length of 'the shaft .and hub assembly. -The bearing Il can made lsuiiiciently largevin take and tra 'nsn 1 ii: .,y entire thrust load; static load.`and rotationaljload without Vrequiring vthe extension of the;}'l'e 'x igfth .of vthe v-shaft other than `isfrequired for positioning of the static loadbearings.' This .isaceo'iriplishedI for the chain loaded end ofthe drumf-byemploying two bearing systems., one a stationary'bearing system to take and tansmitthe static portion of the load. and anotherto'carry the rotational load.

In many uses. as. for instance, .in drums .mounted on trucks and tractors;v the 'space between the supportfor the pillow biockand the end of the drum shaft is limited and it is necessary to have as compact an arrangement as posalso permit forthe axial application'of the air pressure 'for actuation of the clutch. The closure member II is mounted so as torotate with the hub II. The stirrup and sprocket hubjarrangev ment provide for air passagewaysto permit of 5 the application of the air pressure to the tube 25. By positioning the rotor seal Il at the axis of 1. s

I can provide for the sealing oil' of thetube'I'la Y lthe bore 2i which is threaded to and locked into and rotates in a seal in I1.

-The rotor seal I1 is shown in'section 3. The tube IIarotates inside the housing of 31.

The shoulder'II is spaced from the shoulder.

The ball race Il is slidably mounted in I'I against I 4a thrust ring Il. A like bali race II is-slidably mounted in Il against a thrust ring 4I and cover 45. The tube I1 has bores II for admission of air and carries by a shrink t the balirace 4I retained against a ring I1 mounted in Ila'. `vThe ball race 4I is carried. by a shrink fit on tube Ila against the shoulder 50. Leather washer 5i or similar packing is mountedin tube 31a by means of springs 52 and operate in housings 5I. The packed oi! areain I1 issmail and the peripheral speed of the packed off surface of 31a is relatively low, and therefore it can hold the necessary high air pressures notwithstanding the relatively high speed at which the drum rotates. The special arrangement of the hub i I to be mounted on the two bearing systems I5 and 8 and 9 makes possible the establishment of an air passageway between 31 and 25.

By the use of the bearing systems described above we are enabled to apply the air pressure for actuation of the air clutch axially of the drum shaft and provide communication between this axially applied air pressure and the clutch.

This construction also avoids the necessity for employing a shaft passing entirely through the drum. In such forms. both when the power isapplied to the shaft and when applied to the drum, the portion of the shaft positioned inside the drum adds weight and little strength to the drum. We have thus clieapened and simplified the construction in this respect.

Variations of the above design will be apparent to those skilled in the art. For example, the sprocket may be replaced by a gear or pulley and the air clutch replaced by an oil-operated or mechanically operated clutch.

While we have described a particular embodiment of vthe invention for the purpose of illustration, it should be understood that various modifications and adaptations thereof may be made within the spirit of the invention as set forth in the appended claims.

We claim:

l. A drum assembly comprising a drum, a shaft, said drum being mounted on said shaft, a sprocket. a hub for said sprocket. axially mounted on said shaft, a clutch for connecting the drum and said shaft to said sprocket, an end support for said shaft, a bearing assembly between said shaft and said support, said bearing assembly comprising bearings between said sprocket hub and said support for transferring rotational loads from said sprocket to said support. other bearing positioned between said sprocket and said shaft, said bearings being positioned in series load-transfer relation with said shaft, said load-transfer .relation including in sequence second-mentioned bearings, said hub and said first-mentioned bearings and said support.

2. A drum assembly comprising a drum, a drum flange connected to said drum, a shaft on which said drum and drum flange are mounted, a hub positioned axially of said shaft and spaced therefrom, a sprocket mounted in driving connection on said hub, a clutch between said sprocket and said drum flange, bearings positioned between the interior surface of said hub and the exterior of said shaft, a pillow block support for said shaft and bearing assembly, and a second bearing mounted on the exterior of said hub and between said hub and said pillow block, said bearings being positioned in series load-transfer relation with said shaft, said load-transfer relation including in sequence second-mentioned bearings. first-mentioned bearings, and said pillow block support. l

3. A drum assembly, comprising a drum and drum ends, a shaft assembly on each end of said drum, said shaft assembly at each end of said drum comprising a drum flange connected to said drum, a shaft on which said drum and drum flange are mounted, a hub positioned axially of said shaft and spaced therefrom, a sprocket mounted in driving connection on said hub. a

6 clutch between said sprocket and said drum flange, bearings positioned between the interior surface of said hub and the exterior of said shaft. a pillow block support for said shaft and bearing assembly, a second bearing mounted on the exterior of said hub and between said hub and said pillow block, and means for driving said sprockets at dierent speeds.

4. A drum assembly comprising a drum. a shaft, said drum being mounted on said shaft. a sprocket axially mounted on said shaft, a uidoperated clutch for connecting the drum and said shaft to said sprocket, an end support for said shaft, a bearing assembly between said shaft and said support, said bearing assembly comprising bearings between said sprocket mounting on said shaft and said support for transferring rotational loads from said sprocket to said support, other bearings positioned between' said sprocket and said shaft. said bearings being positioned in series load-transfer relation with said shaft, said load-transfer series relation including in sequence said second-mentioned bearings and said first-mentioned bearings and said support, a fluid-pressure connection positioned on said support. axially of said shaft, a fluid passageway through said sprocket mounting on said shaft,

and a uid connection between said last-named passageway and said clutch.

5. A drum assembly comprising a drum, a drum flange connected to said drum, a shaft on which said drum and drum flange are mounted, a hub positioned axially of said shaft and spaced therefrom. a sprocket mounted in driving connection on said hub, a fluid-operated clutch-between said sprocket and said drum flange, bearings positioned between the interior surface of said hub and the exterior of said shaft, a pillowl block support for said shaft and bearings, a second bearing mounted on the exterior of said hub and between said hub and said pillow block, a closure at the end of said shaft and connected to said hub. enclosing said first-mentioned bearings, an air inlet mounted in said closure and axially of said shaft, a conduit in said hub and connected to said air inlet. and a fluid conduit connecting said hub conduit and said clutch.

6, A drum assembly comprising a drum, a drum flange connected to said drum, a shaft, said drum flange kbeing mounted on said shaft. a sprocket disc and hub mounted for rotation on said shaft, a clutch air-pressure chamber mounted on said disc. a clutch plate mounted on said air-pressure chamber with its clutch face parallel to the axis of said shaft, a clutch ring mounted on said drum flange parallel to said clutch plate and in clutchengaging relation with said clutch plate, an air inlet passageway positioned axially of said shaft, an air connection between said sprocket disc and said air-pressure chamber, and an air passageway connecting said inlet passageway and said air connection and mounted to rotate with said sprocket disc.

7. A drum assembly comprising a drum, a drum flange connected to said drum, a shaft, said drum flange being mounted on said shaft, a sprocket disc and hub mounted for rotation on said shaft, a clutch air-pressure chamber mounted on said disc, a clutch plate mounted on said air-pressure chamber with its clutch face parallel to the axis of said shaft, a clutch ring mounted on said drum flange parallel to said clutch plate and in clutch-engaging relation with said clutch plate, an air inlet passageway positioned axially of said shaft, an air connection between said 7 sprocket disc and said air-pressure chamber, anair passageway connecting said inlet passageway and said air connection and mounted to rotate with said sprocket disc. and a brake flange mounted on said drum flange and spaced from said clutch ring.

8. A drum assembly comprising a drum. a drum shaft, said drum being mounted on said ldrum shaft, a drum ange connected to said drum. a hub positioned axially of said shaft and spaced therefrom, a sprocket mounted in driving connection on said hub, a clutch between said sprocket and said drum flange, bearings'lpositioned between the interior surface of said' hub and the exterior of said shaft, a pillow block support for said shaft and bearing assembly, and a second bearing mounted on the exterior of said hub and between said hub and said pillow block.

9. A drum assembly comprising a drum, a shaft. said drum being mounted on said shaft, a sprocket axially mounted on said shaft, a clutch for connecting the drum and said shaft to said sprocket, an end support for said shaft, a bearing assembly between said shaft and said support,

said bearing` assembly comprising bearings bei.A tween said sprocket mounting on said shaft and", said support for transferring rotational leads \v from said sprocket to said support. other bearl ings positioned between said sprocket and said shaft, said. bearings being positioned in series load transfer relation with said shaft, said series load transfer relation including in sequence said second mentioned bearings, said first-mentioned bearings, and said support.

EDMoND MWAGNER. JAMES Moon.

nEFanENcEs crrsn The followiru,r references are of record in the tile of this patent:

UNITED STATES PATENTS v Certificate of Correction Patent No.2,565f191 EDMOND'M. WAGNER ET AL.

August 28, 1951 It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

.Column 8, line 3, for leads read loads;

and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case 1n the Patent Oce.

Signed and sealed this 18th day of December, A. D. 1951.

[ml-l THOMAS v1a'. MURPHY,

Assistant Uommim'oner of Patents.

7 sprocket disc and said air-pressure chamber, anair passageway connecting said inlet passageway and said air connection and mounted to rotate with said sprocket disc. and a brake flange mounted on said drum flange and spaced from said clutch ring.

8. A drum assembly comprising a drum. a drum shaft, said drum being mounted on said ldrum shaft, a drum ange connected to said drum. a hub positioned axially of said shaft and spaced therefrom, a sprocket mounted in driving connection on said hub, a clutch between said sprocket and said drum flange, bearings'lpositioned between the interior surface of said' hub and the exterior of said shaft, a pillow block support for said shaft and bearing assembly, and a second bearing mounted on the exterior of said hub and between said hub and said pillow block.

9. A drum assembly comprising a drum, a shaft. said drum being mounted on said shaft, a sprocket axially mounted on said shaft, a clutch for connecting the drum and said shaft to said sprocket, an end support for said shaft, a bearing assembly between said shaft and said support,

said bearing` assembly comprising bearings bei.A tween said sprocket mounting on said shaft and", said support for transferring rotational leads \v from said sprocket to said support. other bearl ings positioned between said sprocket and said shaft, said. bearings being positioned in series load transfer relation with said shaft, said series load transfer relation including in sequence said second mentioned bearings, said first-mentioned bearings, and said support.

EDMoND MWAGNER. JAMES Moon.

nEFanENcEs crrsn The followiru,r references are of record in the tile of this patent:

UNITED STATES PATENTS v Certificate of Correction Patent No.2,565f191 EDMOND'M. WAGNER ET AL.

August 28, 1951 It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

.Column 8, line 3, for leads read loads;

and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case 1n the Patent Oce.

Signed and sealed this 18th day of December, A. D. 1951.

[ml-l THOMAS v1a'. MURPHY,

Assistant Uommim'oner of Patents. 

